Branislav Kisacanin was inspired by the Lego NXT Rubik’s Cube Solver and Lego Sudoku solvers and the Segway-like NXT robots. Unlike them, Tetris-Bot is not an NXT-only system, because the Brick has a limited input bandwidth. That’s why I use a TI DM6437 DSP board to analyze the images coming from the camera, recognize the new shape, and find the best place and orientation for it. The instructions are communicated to the NXT robotic hand via LEDs on the board. Watch the Tetris-Bot video on YouTube. Happy Puzzling!